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Varaždin, Croatia

This article shows the method of ranking the factors in the study of efficiency and effectiveness of the process of quality management system certification compliant with the requirements of international standard ISO 9001. During the research of efficiency of the quality management systems certification process in enterprises of metal processing industry in Croatia, various impact factors that affect the certification process have been identified. Therefore, the issue arose whether each factor could be treated equally, i.e. whether there are factors that are more important and have a more pronounced effect and greater impact on the certification process. The survey collected the opinions of competent experts in certification institutions, i.e. of external auditors who are directly involved in the certification process, and the representatives of the quality of the companies that have certified the system for at least two years. After the data was collected, ranking of impact factors and analysis of results was conducted.

We elaborate on the design and time-space complexity of data structures and several original algorithms that resulted from the DSA program - a tool that simulates dynamical systems and produces their stochastic finite automata models according to the theory of ε-machines An efficient batch iteration algorithm generates the system points and their binary symbols, and stores them in circular buffers realized as class member arrays. The words extracted from the time series are fed into a dynamically created binary tree of selected height. The tree is then searched for morphologically and stochastically unique subtrees or morphs, by aid of an algorithm that compares (sub)trees by their topology and the descendant nodes' conditional probabilities. The theoretical analysis of algorithms is corroborated by their execution time measurements. The paper exemplifies how an implementation of a scientific modelling tool like the DSA, generates a range of specific algorithmic solutions that can possibly find their broader use.

Havas L.,Polytechnic of Varazdin | Medved V.,University of Zagreb | Sko C Ir Z.,University of Zagreb
Communications in Computer and Information Science | Year: 2015

Fast development of mobile ICT technologies enabled and imposed their implementation in business and sports. As mobile technologies enable quick two-way communication, independent of the present location of athletes, their trainer or expert hardware and software systems, it is significantly important to utilize the advantages of that kind of communication to maximize the chances of achieving excellent results in a specific training process. This paper shows one ORT (Online Running Trainer) system, which was developed for preparations of marathon runners. It describes algorithms for calculation of training equivalents of set and achieved trainings, which was used for the success analysis of every micro cycle of the training process. By using available telecommunication channels, ORT system communicates with users in real time. It analyses their performance and, if necessary, dynamically corrects their training parameters to achieve better results in needed moment. Described methods are verified on a selected sample of runners. © Springer International Publishing Switzerland 2015.

Glavinic V.,University of Zagreb | Ljubic S.,University of Rijeka | Kukec M.,Polytechnic of Varazdin
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2011

Present day mobile applications are becoming increasingly pervasive and complex, involving sophisticated user interfaces and touchscreen-based interaction designs. Their overall acceptance is highly dependent on usability, hence there exists a strong need to make related usability issues an integral part of the mobile software development. In this paper we propose a touchscreen meta-testing model, a set of individual test cases which represents what we believe to be the basic aspects of usability, common to all touchscreen applications. The main goal of the meta-test is to provide relevant feedback on elementary mobile touchscreen interaction, and to use obtained results as important parameters and usability guidelines within the mobile software development process. Along with universal usability support for touchscreen mobile applications in general, this experimental framework can provide some additional benefits, related to different possible ways of both applying meta-test model and using its final outcomes. © 2011 Springer-Verlag.

Glavinic V.,University of Zagreb | Ljubic S.,University of Rijeka | Kukec M.,Polytechnic of Varazdin
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

In order to create high quality and easy-to-use mobile software, the process of mobile device applications (MDAs) development must be accommodated to usability challenges. As present-day MDAs mostly target smartphones, with touchscreen ones increasingly gaining popularity, the primary focus in improving this process should include support for usability awareness at the earliest possible development phase for this class of mobile devices. In this paper we propose a model interaction benchmark test providing both quantitative and qualitative usability feedback at the elementary touchscreen action level. © 2010 Springer-Verlag.

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